Table 1.

Definition of resectability as per NCCN Guidelines for pancreatic head cancer

	Localised and resectable (R)	Borderline resectable (BR)	Locally advanced and not resectable (LA)
A	Clear fat planes around CA, HA, SMA	Encasement of GA up to HA with either short segment encasement or direct abutment of HA without extension to CA, tumour abutment of the SMA which does not exceed greater than 180° of the circumference of the vessel wall	Aortic invasion or encasement of more than 180° of SMA, any celiac axis or IVC abutment, encasement of the SMA or CA
V	No distortion of SMV / PV	Venous involvement of the SMV / PV with distortion or narrowing or occlusion of the vein with suitable vessel proximal and distal, allowing for safe resection and replacement	Not reconstructible SMV/PV

A arterial, V venous, CA coeliac artery, HA hepatic artery, SMA superior mesenteric artery, GA gastroduodenal artery, IVC inferior vena cava, SMV superior mesenteric vein, PV portal vein, NCCN National Comprehensive Cancer Network